They then send one of the pieces back through the cell membrane, where the cell displays it to warn neighboring cells about the invader.

酶(酵素)会把其中一小块碎片回传，传出细胞膜外，用碎片来警告身边的其他细胞，不要上了病毒入侵者的当。

If the immune system comes across non-self HLA proteins, it recognises the cells displaying them as interlopers and attacks, using shock troops called killer T-cells and antibodies.

如果免疫系统遇到非自身 HLA 蛋白，它就会将显示这些蛋白的细胞识别为闯入者，并使用称为杀伤性 T 细胞和抗体的突击部队发起攻击。